Comment 392 for bug 550625

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aa-hcl (aa-hcl) wrote :

Some interesting fact about the driver performance when additional monitors are added:

(system: Dell Latitude E6520, ubuntu 11.04, stick and touchpad):

When I changed the screen resolution from 1920x1080 to one big screen of two monitors (1920x1080 as laptop screen and connected through Matrox Dual box two monitors of 1920x1200 each) of resolution 5940x1200 (with some "dead area" since my laptop screen only 1080) I found that touchpad cursor started to move much faster in horizontal direction only.

It means that apparently the driver somehow adjusted the horizontal speed according to the new size of the screen. The external USB mouse does not do that.

This "scaling" of the horizontal speed does not seems to be a problem for me, I think it is quite nice.

Please let me know if you need any further info about my system if you think it is useful.

Many thanks!